Antitampering device



Mar ch 10, 1936. p BRANTLEY 2,033,875

ANTITAMPERINd DEVICE Filed Feb. 28, 1935 INVENTOR.

I BY I ATTORNEYS,

Patented Mar. 10,. 1936 UNITED STATES PATENT OFFICE ANTITAMPERING DEVICE Peter A. Brantley, New Orleans, La. Applicatio'n" February as, 1935, Serial No. 8,742

' and the like as a permanent indication of inspection and licensing and when once secured to the intended device cannot be tampered with without totally destroying the device.

The invention is of a nature that when attached to various articles-or devicesas before referred-to, any attempt to unlawfully-remove the device or the signal will be apparent upon a regular inspection by. utility representative or the like."

Other objects or the invention will be fully understood from the following description and claims when the same are read in connection with the drawingaccompanying and forming part iii-this specification, in which 'Figure 1 is .a" side elevation illustrating -my novel device as same appears when attached to a vehicle, meter or other, support. Y

Figure 2 is a front elevation of the .device. Figure 3 is a longitudinal sectional view taken on the line 3-3 of Figure 2 and looking in the direction of the arrows. 1 Figure 4 is a'transverse vertical view takenin the plane indicated by theline H of Fig- .ure 3, and looking in the direction of .tlie arrows.

g 5 is a i'ront elevation of the key-lockingprojection plate.-

Figure-fi ls an edge elevation of same. Figure 7 is a transverse vertical section taken in the plane indicated on the' line 1-1 of Figure 3 a nd looklng-in the direction oi. the arrows.

i Figure 8 is a side elevation of the tumbler.

Figure 9 is a front view thereof. i Figure 10 isa side elevation ota tumbler spring. Similar numerals designate corresponding parts in all the views of the drawing.

The device may be secured to any support such as I and the said'device is indicated as a whole by 2 and consists of atumbler 3 having the collar I andspring. 6. The tumbler isiurther provided on one end with-an integral key 5 while the,

spring is adapted to surround the collar and abut at one end againstthe closure plate I and -at the opposite end against the collar 4. This spring acts to retainthe key in its normal locked position and-prevents accidental or casual-di'se placement of the key and tumbler with respect to the closure platel.

- portion and a front member having comin 01. 40-22)- The closure plate I has a peripheral bend at 8 and is provided with an inwardly directed flange 9, so as to embrace or retain the members in, ii, and I2. The closure plate is provided with a' central opening or key slot l4 to receive the key 5 or the tumbler 4 and the plate I is provided with projections l that are punched from the plate In whereby slots are formed at It insaid plate In. The plate i is provided with projections I! that' engage recesses l8 of the plate It) whereby casual turn- \ing or manipulation of the .plate I with respect to the plate is prevented. At 2|l a card or other device on which a permit, or other writing is printed is positioned. The member I! is a plate of convex glass andthis glass is provided with'a flange that is engaged within the bend 8 and flange 9 of the closure plate 1..

Inthe practical use of the device an-opening' is bored into a support and the tumbler with the spring surrounding same is inserted thereon. 'The plate or closure 1 is then positioned so that the opening ll of the closure 1 passes around the key. 5, so as to lock the closure to the 1 support and tumbler. The projections IE will engage the key 5 so as to prevent removal of the.

plate due to the fact thatthe key cannot be brought into the position to unlock the plate from the support. Maniiestly the guards and members I 0,- II and I2 are first assembled with respect to themember I and the. entire assembly secured on the support l'and the device locked with the key thereby preventing unauthorized tampering with the device. If desired 8.

- light or other means may be used to illuminate the license or. card as occasion may require.- It will be apparent from the foregoing that the construction is extremely simple and comprises but a minimum of elements and is not liable to i become inoperative after a short period of use and any attempt to destroy either the device or the element to which it is attached .will be readily apparent to authorized persons.

What I--claim iszv '1. In combination, a housing comprising a back member having a cup-shaped central portion and an inwardly opening channel extending from the edge of the open side of the central its peripheral portion positioned and fitting in said channel, a

locking plate in said housing having its peripher-' al portion fitting in said channel and having locking means thereon projectingtoward the central'portion oi the back member, said central portion having a key-way slot thereinlostem extending therefrom and a key portion on the end of the stem, said tumbler being positioned with the head and stem thereof outside of said housing and the key portion thereof ex- I locking means being so constructed and arranged that the key portion after rtion through said slot and rotation through predetermined angle is engaged by said locking means and held against rotation in either direction.

2. The combination of a housing comprising a member having a cup-shaped portion and an opening channel extending from the edge of the opera side of the portion and a second member formed adjacent the first member and having its peripheral portion positioned and fitting insaid cated so as to be oifset with respect to said lock- 4 ing means, and a tumbler comprising ahead, a

channel, a locking plate arranged in the first member and having its peripheral portion fitting in said channel and having locking means there-' on extending toward the central portion of the first member; said central portion having a keyway slot therein positioned oifset with respect to the locking means, and a tumbler comprising a head, a stem extending therefrom and a key portion formed on the end of the stem, said tumbler portion bein positioned with the head andstem thereof outside of the first member and the key portion extending through the slot and positioned within the first member between the central portion of the first member and the looking plate, a compression spring on the stem engaging the head and the first member; said key portion and locking means being so constructed and'arranged that the key portion after insertion through said slot and rotation to a predetermined an'gie is engaged by the locking means and I held against rotation in'either direction.

PETER A. BRANTLEY. 

